Troubleshooting › Audio entertainment system › Diagnosis
B1B0711-故障诊断 · T00617179

 B1B0711 - TroubleshootingB1B0711-故障诊断

Fault code description故障码说明
DTC故障码(DTC)
Fault code description故障码描述
Possible cause of failure可能故障原因
B1B0711
The left front MIC signal is short-circuited to ground.左前MIC信号短路到地
1.MIC signal line failure1.MIC信号线故障
Troubleshooting steps故障诊断步骤
①General inspection一般检查
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。
2. Check whether the front dome light wiring harness is damaged or broken.检查前排顶灯线束是否存在损坏、断裂等现象。
3. Check the front dome light wiring harness connector for loose connection or damage.检查前排顶灯线束接插件是否存在虚接、损坏等现象。
Are the test results normal?检查结果是否正常？
Yes是 Go to step 2.去步骤2。
No否 Repair or replace faulty wiring harness or connector.维修或更换故障线束或接插件。
②Check the left front MIC signal line检查左前MIC信号线路
Graphic
1. Power state is "OFF", disconnect the negative terminal of the 12V battery.电源状态“OFF”，断开蓄电池负极。
2. Disconnect the T-BOX wiring harness connector IP63, the front dome light wiring harness connector BD47 and the vehicle infotainment head unit wiring harness connector IP48.断开T-BOX线束接插件IP63、前排顶灯线束接插件BD47和车载智能多媒体主机线束接插件IP48。
3. Use a digital multimeter to measure the resistance between pin 12 of the IP48 and ground.用数字万用表测量IP48的12号针脚与接地之间的电阻。
Standard resistance value: >1M标准电阻值：＞1M Ω
Are the test results normal?检查结果是否正常？
Yes是 Go to step 3.去步骤3。
No否 Repair or replace the left front MIC signal harness.维修或更换左前MIC信号线束。
③Replace front dome light更换前排顶灯
1. Replace the front dome light with a new one and check whether the fault code and symptoms are eliminated.更换新的前排顶灯，检查故障码及症状是否排除。
Are the test results normal?检查结果是否正常？
Yes是 Fault resolved.故障排除。
No否 Go to step 4.去步骤4。
④Replacement of infotainment head unit更换车载智能多媒体主机
1. Replace with a new infotainment head unit and check whether the fault code and symptoms are eliminated.更换新的车载智能多媒体主机，检查故障码及症状是否排除。
Are the test results normal?检查结果是否正常？
Yes是 Fault resolved.故障排除。
No否 Look for causes from other symptoms.从其他症状查找原因。
  Caution:注意：
♦  After replacing the infotainment head unit, it is necessary to use a diagnostic instrument to recalibrate the infotainment head unit.更换车载智能多媒体主机后，需用诊断仪对车载智能多媒体主机重新标定。